Mariepskop Mountain Water

Still Mineral Water

Located at the foot of the Northern Drakensberg Mountains, where you'll find some of the purest water springs, our water is drawn from the basalt and sandstone of the mist-shrouded Mariepskop Mountain and is purified by the process of Ultra Filtration, Ultra Violet Sterilization, and Ozonation. (Scroll down to read more about Ozonation and UV sterilization).

We do free weekly deliveries in and around Hoedspruit, Acornhoek and surroundings and two-weekly deliveries in Phalaborwa.


Available in cases of the following:

  • 500ml x 24
  • 750 x 12
  • 1.5L x 12
  • 5L x 4
  • 20 L and 25L
  • Refils and Cooling water dispensers

What is Ozone?

Ozone (O3) is a gaseous material made from oxygen in an electric discharge field (corona discharge) type ozone generator. This ozone gas stream is brought into contact with the water to be treated in a device called an ozone contactor. In the ozone contactor, the ozone is dissolved in the water and the undissolved ozone in the off-gas is discharged through an ozone decomposer and released at rooftop levels.

Ozone is also produced when UV light of a certain wavelength comes into contact with free oxygen. A full-spectrum lamp will release all UV wavelengths, and will produce ozone when UVC hits oxygen (O2) molecules.

Ozone is a powerful oxidant and an exceptional chemical disinfectant. The ozone treatment process is an integral part of the drinking water treatment plant operation in more than 3,000 municipal water installations worldwide.

The Role of Ozone in Water Bottling

Ozone treatment is one of the most effective microbiological barriers that water bottlers can employ to protect consumers against micro organisms. Consumers are largely unaware, however, that many bottlers worldwide rely on ozone to provide a safe and good tasting product. Since the 1970's, ozone has played a critical role in helping the bottled water industry deliver a safe and aesthetically pleasing product. In fact, one could say that ozone saved the bottled water industry in its infancy, when bottled water wasn't always properly disinfected and was frequently criticized in television and newspaper investigative reports.

Ozone's Effects


Ozone treats the water against bacteria, viruses and parasites such as Giardia and Cryptosporidium. While much more detail can be given, suffice it to say that ozone is highly effective against all of the above microorganisms and more.

Chemical oxidation

Ozone is a powerful oxidizing agent and is very effective against essentially all taste- and odor-causing organic materials and oxidizeable inorganics such as iron, manganese and sulphide ions.


Ozone is an unstable material and decomposes to oxygen fairly quickly. Primarily, water temperature and pH influence the decomposition rate. The half-life of ozone at 20°C and pH 7.0 in potable tap water typically is 24 minutes.

Ozone treatment is a unique and valuable process. It can accomplish all the aforementioned treatment objectives without leaving a taste or chemical residue behind. Ozone is an exceptionally powerful disinfectant and oxidant. It does its job and disappears, leaving the water free of disinfection byproducts.

UV sterilization

Using UV light for disinfection of drinking water dates back to the year 1910 in Marseille, France. In 1955, UV water treatment systems were applied in Austria and Switzerland; by 1985 about 1,500 plants were in use in Europe. In 1998 it was discovered that protozoa such as cryptosporidium and giardia were more vulnerable to UV light than previously thought; this opened the way to wide-scale use of UV water treatment. By 2001, over 6,000 UV water treatment plants were operating in Europe.

Over the years, UV costs have declined as researchers develop and use new UV methods to disinfect water and wastewater. Currently, several countries have developed regulations that allow systems to disinfect their drinking water supplies with UV light.

How does it work?

UV light iselectromagnetic radiation with wavelengths shorter than visible light. UV can be separated into various ranges, with short-wavelength UV (UVC) considered "germicidal UV". At certain wavelengths, UV is mutagenic to bacteria, viruses and other microorganisms. Particularly at wavelengths around 250 nm–260 nm UV breaks molecular bonds within micro organismal DNA, producing thymine dimers that can kill or disable the organisms. It is a process similar to the effect of longer wavelengths (UVB) producing sunburn in humans. Microorganisms have less protection from UV and cannot survive prolonged exposure to it.

A UVGI system is designed to expose environments such as water tanks, sealed rooms and forced air systems to germicidal UV. Exposure comes from germicidal lamps that emit germicidal UV electromagnetic radiation at the correct wavelength, thus irradiating the environment. The forced flow of air or water through this environment ensures the exposure.


The effectiveness of germicidal UV depends on the length of time a microorganism is exposed to UV, the intensity and wavelength of the UV radiation, the presence of particles that can protect the microorganisms from UV, and a microorganism’s ability to withstand UV during its exposure.

In many systems, redundancy in exposing microorganisms to UV is achieved by circulating the air or water repeatedly. This ensures multiple passes so that the UV is effective against the highest number of microorganisms and will irradiate resistant microorganisms more than once to break them down.

The effectiveness of this form of disinfection depends on line-of-sight exposure of the microorganisms to the UV light. Environments where design creates obstacles that block the UV light are not as effective. In such an environment, the effectiveness is then reliant on the placement of the UVGI system so that line of sight is optimum for disinfection.

Dust and films coating the bulb lower UV output. Therefore, bulbs require periodic cleaning and replacement to ensure effectiveness. The lifetime of germicidal UV bulbs varies depending on design. Also, the material that the bulb is made of can absorb some of the germicidal rays.

One method for gauging UV effectiveness is to compute UV dose. The U.S. EPA publishes UV dosage guidelines for water treatment applications. UV dose cannot be measured directly but can be inferred based on the known or estimated inputs to the process:

  • Flow rate (contact time)
  • Transmittance (light reaching the target)
  • Turbidity (cloudiness)
  • Lamp age or fouling or outages (reduction in UV intensity)

Inactivation of microorganisms

The degree of inactivation by ultraviolet radiation is directly related to the UV dose applied to the water. The dosage, a product of UV light intensity and exposure time, is usually measured in micro joules per square centimeter, or equivalently as microwatt seconds per square centimeter (µW·s/cm2). Dosages for a 90% kill of most bacteria and viruses range from 2,000 to 8,000 µW·s/cm2. Larger parasites such as cryptosporidium require a lower dose for inactivation. As a result, the U.S. Environmental Protection Agency has accepted UV disinfection as a method for drinking water plants to obtain cryptosporidium, giardia or virus inactivation.

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